Hydroairplane



March 13, 1928.

M. M. KARGER HYDROAIRPLANE Filed- June 27. 1927 ATTORNEY.

Patented Mar. 13, 1928.

UNITED STATES PATENT OFFICE.

MILTON M. .KARGER, F MILWAUKEE, WISCONSIN.

HYDROAIRPLANE.

Application filed June 27, 1927. Serial No. 201,726.

increased floating capacity and stability and thus capable of making a safe landing at sea, remaining afloat indefinitely, and again rising from the sea as conditions warrant.

Other objects and advantages will appear from the following description of an illus trative embodiment of the present invention.

In the drawings:

Figure 1 is a side elevation of a hydroairplane constructed and equipped in accordance with the present invention.

Fig. 2 is a bottom plan view thereof. The hydro-airplane selected for illustration includes a fuselage shaped to form a hull having longitudinally spaced prow and stern portions 10 and 11, integrally connected through a cabin portion 12, superimposed thereon. lVings, conventionally shown at 13, are anchored to the cabin portion and braced by the usual struts 14 fixed to the prow portion 10. The machine shown is driven by a plurality of propellers 15 of usual construction mounted in this instance upon the wings. The stern 11 carries the usual rudder 16 and elevators 17 of conventional form. The prow and stern portions are of water tight construction, the former being closed by a bulk-head or partition 18 and the latter by a partition 19 which extends upwardly and separates the interiors disposed side by side beneath the cabin portion intermediate the prow and stern portions. Each is preferably substantially circular in transverse section and longitudinally tapered toward the rear. They are proportioned and arranged to substantially till the space between the prow and stern portions and to generally conform to and cooperate with those portions in such mannor as to give the entire hull a substantially stream line form. The tanks are preferably flat ended and snugly confined between the partitions 18 and 19 and are retained in place by appropriate hangers such as straps 21 lined to the floor 22 of the cabin. The tanks are air tight and are ordinarily filled with air, hydrogen, helium or other suitable gas, although their circular construction will readily withstand the creation and maintenance of a vacuum therein.

Various changes may be made in the embodiment of the invention hereinabove specifically described without departing from or sacrificing any of the advantages of the invention as defined in the appended claim.

I claim p In a hydro-airplane the combination of a hull having longitudinally spaced prow and stern portions, partitions closing said prow and stern portions, a cabin above said prow and stern portions connect-ingthe same, and

a plurality of substantially circular tanks 

